The site uses Yahoo’s Geocoding API which is based on NAVTEQ and Tele Atlas street data, hence it can give more accurate results than a TIGER-based geocoder.

I simply export unique household identifiers and their addresses from SPSS to DBF-IV, open it in Excel, and copy and past it into the html batch geocoder interface. Once the geocoding is done, I copy from the interface and paste back into excel. Save it as excel, import into SPSS, and then merge back into the original db (make sure to sort HHID in ascending order for both databases).